Antigenic comparison of five species of mammalian zonae pellucidae

The Journal of Experimental Zoology
G A Maresh, B S Dunbar


A comparison of glycoproteins of the zona pellucida (ZP) of five different mammalian species (cat, dog, rabbit, pig, and rat) has been made using polyclonal and monoclonal antibodies. In an enzyme-linked immunosorbent assay (ELISA), polyclonal antisera against total rabbit and pig ZP recognize their homologous ZP to the greatest extent but also detect crossreactive antigenic determinants in the ZP of all other species tested. Polyclonal antibodies against each of two purified rabbit ZP glycoproteins or one purified pig ZP glycoprotein also show some recognition of heterologous (pig, cat, and dog) ZP, but not rat ZP. Monoclonal antibodies (McR5-rabbit ZP protein determinant; McPSI-determinant associated with post-translational modifications of pig ZP proteins such as carbohydrates) further demonstrate that specific determinants are shared between some but not all of these mammalian species. For example, both of these antibodies recognize distinct determinants which are most abundant in pig and cat ZP. However, McR5 recognizes a determinant on all species of ZP except the rat, while McPSI does not recognize either the rabbit or rat ZP. Collectively, these studies suggest that the molecules of the pig, dog, and cat ZP are more clo...Continue Reading


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